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Item Metadata only Effect of manganese and iron doping on the properties of strontium bismuth tantalate ceramics prepared by auto-combustion of citrate-nitrate gel process(Mahidol University. Mahidol University Library and Knowledge Center, 2005) Temporn Sookawee; Laddawan PdungsapPublication Metadata only Dielectric properties and phase transition behaviors in (1-x) PbZrO3 -xPb (Mg1/2 W1/2) O3ceramics(2009-10-09) Naratip Vittayakorn; Piyanut Charoonsuk; Panisara Kasiansin; Supamas Wirunchit; Banjong Boonchom; King Mongkut's Institute of Technology Ladkrabang; Mahidol University; South Carolina Commission on Higher EducationThe solid solution of lead zirconate [PbZrO3 (PZ)] and lead magnesium tungstate [Pb (Mg1/2 W1/2) O3(PMW)] has been synthesized by the wolframite precursor method. The crystal structure, phase transformations, dielectric and thermal properties of (1...-x) PZ-xPMW, where x=0.00-0.10, were investigated. The crystal structure of sintered ceramics was analyzed by x-ray diffraction. Phase-pure perovskite was obtained for all compositions. Furthermore, a change from orthorhombic to rhombohedral symmetryPublication Metadata only Effect of BiAlO3modification on the stability of antiferroelectric phase in PbZrO3ceramics prepared by conventional solid state reaction(2011-02-03) Naratip Vittayakorn; Banjong Boonchom; King Mongkut's Institute of Technology Ladkrabang; Mahidol University; South Carolina Commission on Higher EducationIn this paper, we report on the polycrystalline (Pb (1-3x/2) Bi x )(Zr 1-3x/4 Al x )O 3 (PZO-BAO) ceramics, with x = 0.0-0.3, prepared by conventional solid state reaction. The crystal structure and thermal and dielectric properties of the sintered... the structural stability of the overall perovskite phase. Dielectric, thermal and P-E hysteresis results confirmed that no ferroelectric intermediate phase was seen in the PZO-BAO system. An antiferroelectric phase can be stable in a wide temperature rangePublication Metadata only Spherical nanocrystalline barium zirconate titanate prepared by Co-precipitation in highly basic aqueous solution(2013-01-01) Panpailin Seeharaj; Supamas Wirunchit; Piyanut Charoonsuk; Pattaraporn Kim-Lohsoontorn; Naratip Vittayakorn; King Mongkut's Institute of Technology Ladkrabang; Mahidol Universityof calcination process. SEM analysis showed that BZT had nanosized spherical morphology with uniform shape and size. The crystal sizes obtained by TEM analysis were 20-40 nm. © 2013 Copyright Taylor and Francis Group, LLC.Publication Metadata only Phase transitional behavior and dielectric properties of lead free (1-x)(K0.5Na0.5)NbO3-xBi (Zn0.5Ti0.5)O3ceramics(2009-06-24) Manoon Sutapun; Chien Chih Huang; David P. Cann; Naratip Vittayakorn; Mahidol University; Oregon State University; King Mongkut's Institute of Technology LadkrabangLead-free ceramics based on potassium sodium niobate [(K0.5Na0.5)NbO3; KNN]-bismuth zinc titanate [Bi(Zn0.5Ti0.5)O3; BZT] were prepared by the modified-conventional mixed oxide route with normal sintering. The crystal structure and ferroelectric